Nanotechnology: Fe3+/Fe2+ - ZnO nanostructures: Synergetic effect of annealing temperature on Structural, Optical and Dielectric properties
Keywords:Fe3/Fe2, Doped Zinc Oxide, SEM, Photoluminescence, FT-IR, Impedance
The influence of Fe3+ ion substitution on structural, optical and dielectric properties of ZnO nanostructures synthesised using the co-precipitation process is discussed in this paper. The wurtzite hexagonal structure with space group P63mc is confirmed by the XRD (X-Ray Diffraction) results. The domain size, intra-plane spacing and cell volume of the Fe3+/ZnO-400 samples were calculated to be 38.6 nm, 2.6903 nm and 57.44 Å3 respectively. SEM was used to undertake surface morphology studies, element mapping and EDS (Energy Dispersive Spectra). The photoluminescence spectra were measured using a photoluminescence spectrometer with a 325 nm excitation wavelength. FTIR (Fourier Transform Infrared Spectrometer) spectrometer was used to measure IR spectra with peaks around 536-634 cm-1. Complex impedance spectroscopy of the Fe3+/ZnO-400 samples were performed at 310 K using a galvanostat in the frequency range of 5 MHz to 50 Hz. The grain edge resistance of the Fe3+/ZnO-400 sample is 18.10 MΩ (at310 K)
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